Question: You need to replace a heat engine that operates on a Carnot cycle with one that has the same efficiency but operates on a Brayton

You need to replace a heat engine that operates on a Carnot cycle with one that has the same efficiency but operates on a Brayton cycle. The Carnot engine low and high temperatures are $-10{ }^{\circ} \mathrm{C}$ and $225^{\circ} \mathrm{C}$. If the working substance in your replacement engine has a $C_{P} / C_{V}$ ratio of 1. 667 , what must the engine's pressure ratio be?

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